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CVE-2024-56644 is a resource-leak flaw in the Linux kernel IPv6 routing path. When TCP invokes ip6_negative_advice() for an expired IPv6 exception destination cached by a socket, the socket's destination reference can remain unbalanced. The function previously took an additional destination reference immediately before resetting the socket destination cache; that increment counteracted the decrement performed by sk_dst_reset(). Once the expired destination has been removed from the exception table and the socket cache is reset, the destination object can no longer be released. The flaw affects IPv6; the corresponding IPv4 negative-advice path is not affected.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.